S32K312 PTE13, PTE8 Toggle

[Tasker]

Hi 

I have a query regarding toggling  pins. 

To toggle PTE13 and PTE8 pins in S32K312 below code was used, but the pins are not toggling.

The register MSCR and GPDO is configured as 0x00200000 and 0x0 - 0x1 respectively.

Since the Pins are not toggling, is there any other registers to be configured.

Sharing the sample c code the below,

Code START ---->>

...

#define WRITE32BREGTOPIN( address, value) (*(volatile uint32*) (address)) = value
#define WRITE8BREGTOPIN( address, value) (*(volatile uint8*) (address)) = value

uint8 i;

..

WRITE32BREGTOPIN(0x40290474,0x00200000);  // MSCR of PTE13
WRITE32BREGTOPIN(0x40290460,0x00200000); // MSCR of PTE8
 for(i=0;i<100;i++);
 for(i=0;i<10;i++)
 {
 WRITE8BREGTOPIN(0x4029138E,0x0); // GPDO of PTE13
 WRITE8BREGTOPIN(0x4029138B,0x0); // GPDO of PTE8
 for(i=0;i<100;i++);
 i++;
 }

WRITE8BREGTOPIN(0x4029138E,0x1); // GPDO of PTE13
 WRITE8BREGTOPIN(0x4029138B,0x1); // GPDO of PTE8

<<----- Code ENDS

Thank you

[Robin_Shen]

Hi

Please download S32K3xx Pins and Clocks with RTD - Training (06_S32K3XX_PINS_AND_CLOCKS_WITH_RTD_TRAINING).

Best Regards,
Robin
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[dylan_cristiani]

Do you se that the pins are always on? your code is a bit strange because when you enter the second for (i<10) loop, you toggle the leds off, then you perform another delay for to 100 with the same 'i' index then you add +1 to the index; the the inner for, that ends when i>= 10, ends immediatly because i=101 so you break and switch on the leds quite 'immediatly'; in general i'ts not a good programming choice to change the index's value inside its for statement, due to side effects like this one; try to make a basic delay using another index variable (for instance write a simple function to be called); and more: a for cycle from 0 to 99 is probably a little bit short to notice some 'delay effect'